Nigon is the second underground race.

demons run around the map because they are larger than humans, elves, etc., and they don't need animals. But what if a small illithid runs around on its own? I don't know how that would turn out. Maybe it would be too small.

You came up with some good ideas regarding magic and new spells. By the way, I was also thinking about darkness... it creates a small area on the battlefield, and the enemy cannot attack; they have to leave it. I also liked "Hatred," and the other spells are good too.